init.php

<?php
/*
Plugin Name: Pods - Custom Content Types and Fields
Plugin URI: http://podsframework.org/
Description: Pods is a framework for creating, managing, and deploying customized content types and fields
Version: 2.1.1 Beta 1
Author: Pods Framework Team
Author URI: http://podsframework.org/about/
Text Domain: pods
Domain Path: /languages/

Copyright 2009-2013  Pods Foundation, Inc  (email : contact@podsfoundation.org)

This program is free software; you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation; either version 2 of the License, or
(at your option) any later version.

This program is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
GNU General Public License for more details.

You should have received a copy of the GNU General Public License
along with this program; if not, write to the Free Software
Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA  02110-1301  USA
*/

/**
 * @package Pods\Global
 */

// Prevent conflicts with Pods 1.x
if ( !defined( 'PODS_VERSION' ) && !defined( 'PODS_DIR' ) && !function_exists( 'pods_ui_manage' ) ) {
    define( 'PODS_VERSION', '2.1.1-b-1' );

    if ( !defined( 'PODS_GITHUB_UPDATE' ) )
        define( 'PODS_GITHUB_UPDATE', false );

    if ( !defined( 'PODS_GITHUB_BRANCH' ) )
        define( 'PODS_GITHUB_BRANCH', '2.1.x' );

    if ( !defined( 'PODS_WP_VERSION_MINIMUM' ) )
        define( 'PODS_WP_VERSION_MINIMUM', '3.4' );

    if ( !defined( 'PODS_PHP_VERSION_MINIMUM' ) )
        define( 'PODS_PHP_VERSION_MINIMUM', '5.2.4' );

    if ( !defined( 'PODS_MYSQL_VERSION_MINIMUM' ) )
        define( 'PODS_MYSQL_VERSION_MINIMUM', '5.0' );

    define( 'PODS_SLUG', plugin_basename( __FILE__ ) );
    define( 'PODS_URL', plugin_dir_url( __FILE__ ) );
    define( 'PODS_DIR', plugin_dir_path( __FILE__ ) );

    global $pods, $pods_init, $pods_form;

    require_once( PODS_DIR . 'functions.php' );

    // @todo Allow user to opt-in to future betas easily
    if ( PODS_GITHUB_UPDATE ) {
        $update = admin_url( 'update.php' );
        $update = str_replace( get_bloginfo( 'wpurl' ), '', $update );

        $update_network = network_admin_url( 'update.php' );
        $update_network = str_replace( get_bloginfo( 'wpurl' ), '', $update_network );

        if ( is_admin() &&
             ( isset( $_GET[ 'pods_force_refresh' ] ) ||
               ( 'update-selected' == pods_var( 'action' ) &&
                 ( false !== strpos( $_SERVER[ 'REQUEST_URI' ], $update ) ||
                   false !== strpos( $_SERVER[ 'REQUEST_URI' ], $update_network ) ) ) ) ) {

            // Configuration
            $user = 'pods-framework';
            $repo = 'pods';
            $branch = PODS_GITHUB_BRANCH;

            // GitHub Plugin Updater
            // https://github.com/jkudish/WordPress-GitHub-Plugin-Updater
            require_once( PODS_DIR . 'updater.php' );

            $version = PODS_VERSION;

            if ( isset( $_GET[ 'pods_force_refresh' ] ) )
                $version = '0.1';

            if ( 'update-selected' == pods_var( 'action' ) && ( false !== strpos( $_SERVER[ 'REQUEST_URI' ], $update ) || false !== strpos( $_SERVER[ 'REQUEST_URI' ], $update_network ) ) )
                $version = '0.1';

            $config = array(
                'slug' => PODS_SLUG, // this is the slug of your plugin
                'proper_folder_name' => dirname( PODS_SLUG ), // this is the name of the folder your plugin lives in
                'api_url' => 'https://api.github.com/repos/' . $user . '/' . $repo, // the github API url of your github repo
                'raw_url' => 'https://raw.github.com/' . $user . '/' . $repo . '/' . $branch, // the github raw url of your github repo
                'github_url' => 'https://github.com/' . $user . '/' . $repo, // the github url of your github repo
                'zip_url' => 'https://github.com/' . $user . '/' . $repo . '/zipball/' . $branch, // the zip url of the github repo
                'sslverify' => false, // whether WP should check the validity of the SSL cert when getting an update, see https://github.com/jkudish/WordPress-GitHub-Plugin-Updater/issues/2 and https://github.com/jkudish/WordPress-GitHub-Plugin-Updater/issues/4 for details
                'requires' => '3.4', // which version of WordPress does your plugin require?
                'tested' => '3.5', // which version of WordPress is your plugin tested up to?
                'version' => $version
            );

            new WPGitHubUpdater( $config );
        }
    }

    if ( false !== pods_compatible() && ( !defined( 'SHORTINIT' ) || !SHORTINIT ) ) {
        if ( !defined( 'PODS_DEPRECATED' ) || PODS_DEPRECATED )
            require_once( PODS_DIR . 'deprecated/deprecated.php' );

        $pods_form = pods_form();

        $pods_init = pods_init();
    }
}
// Deactivate old Pods / Pods UI plugins
else {
    function pods_deactivate_1_x () {
        if ( defined( 'PODS_VERSION' ) && defined( 'PODS_DIR' ) && file_exists( untrailingslashit( PODS_DIR ) . '/init.php' ) ) {
            if ( !function_exists( 'deactivate_plugins' ) )
                include_once ABSPATH . 'wp-admin/includes/plugin.php';

            deactivate_plugins( untrailingslashit( PODS_DIR ) . '/init.php' );
        }

        if ( function_exists( 'pods_ui_manage' ) && file_exists( ABSPATH . WP_CONTENT_DIR . 'plugins/pods-ui/pods-ui.php' ) ) {
            if ( !function_exists( 'deactivate_plugins' ) )
                include_once ABSPATH . 'wp-admin/includes/plugin.php';

            deactivate_plugins( ABSPATH . WP_CONTENT_DIR . 'plugins/pods-ui/pods-ui.php' );
        }

        // next refresh will load 2.0
    }

    add_action( 'init', 'pods_deactivate_1_x' );
}